阅读说明：本技术 一种频率和强度可调的摆动磁场发生装置及发生方法 (Frequency and intensity adjustable oscillating magnetic field generating device and generating method ) 是由 徐建省 冯帆 于 2021-07-23 设计创作，主要内容包括：本发明涉及一种频率和强度可调的摆动磁场发生装置及发生方法,所述装置包括升压模块,整流模块,滤波电容,逆变桥模块,限流模块,电压检测模块,储能电容,两个单向可控开关器件,两组线圈；两组线圈共用一个储能电容；在控制系统的作用下对储能电容进行正反充电,储能电容对两组线圈进行放电,电流依次流过两组线圈产生摆动磁场。本发明通过对储能电容进行正反充电,不但缩短了对储能电容的充电时长,而且节省了电能的消耗,并且可以显著提高摆动磁场频率。(The invention relates to a frequency and intensity adjustable oscillating magnetic field generating device and a generating method, wherein the device comprises a boosting module, a rectifying module, a filter capacitor, an inverter bridge module, a current limiting module, a voltage detection module, an energy storage capacitor, two unidirectional controllable switching devices and two groups of coils; the two groups of coils share one energy storage capacitor; the energy storage capacitor is positively and negatively charged under the action of the control system, the energy storage capacitor discharges the two groups of coils, and current sequentially flows through the two groups of coils to generate a swinging magnetic field. The invention not only shortens the charging time of the energy storage capacitor, but also saves the consumption of electric energy and can obviously improve the frequency of the swing magnetic field by positively and negatively charging the energy storage capacitor.)

1. The utility model provides a frequency and intensity adjustable swing magnetic field generating device which characterized in that: the device comprises a boosting module, a rectifying module, a filter capacitor, an inverter bridge module, a voltage detection module, an energy storage capacitor, a one-way controllable switch device, two groups of coils and a control system; wherein the content of the first and second substances,

the power frequency alternating current is connected with the input end of the boosting module, the output end of the boosting module is connected with the input end of the rectifying module, the output end of the rectifying module is connected with the filter capacitor, the input end of the inverter bridge module is connected with the two ends of the filter capacitor through the current limiting module, the output end of the inverter bridge module is connected with the two ends of the energy storage capacitor, the voltage detection module is connected with the two ends of the energy storage capacitor and used for detecting the voltage of the energy storage capacitor, and the energy storage capacitor is connected with the two groups of coils through the one-way controllable switch device;

the boosting module is used for boosting the voltage of the power frequency alternating current;

the rectifying module and the filter capacitor are used for rectifying and filtering the alternating current after the voltage is raised;

the inverter bridge module is used for carrying out forward and reverse charging and charging voltage control on the energy storage capacitor;

the unidirectional controllable switch device and the two groups of coils are used for generating a swinging magnetic field through the discharge current of the energy storage capacitor.

2. The oscillating magnetic field generating device with adjustable frequency and intensity according to claim 1, wherein: the rectifying module includes a plurality of rectifying diodes.

3. The oscillating magnetic field generating device with adjustable frequency and intensity according to claim 1, wherein:

the unidirectional controllable switch device is a thyristor, and the two groups of coils are respectively connected with the thyristor.

4. The oscillating magnetic field generating device with adjustable frequency and intensity according to claim 1, wherein: the control system controls the charging time of the inverter bridge module to the energy storage capacitor based on the detection result of the voltage detection module so as to control the charging voltage of the energy storage capacitor; the control system adjusts the time interval between two discharges of the coil by the energy storage capacitor to change the frequency of the swinging magnetic field.

5. The oscillating magnetic field generating device with adjustable frequency and intensity according to claim 1, wherein: each of the two sets of coils comprises one or more coils.

6. A method for generating a wobbling magnetic field with adjustable frequency and intensity, the method comprising:

performing voltage lifting on the power frequency alternating current;

rectifying and filtering the alternating current with the boosted voltage;

carrying out forward and reverse charging and charging voltage control on the energy storage capacitor;

generating a swinging magnetic field through the discharge current of the energy storage capacitor;

wherein, carry out forward, reverse charge to energy storage capacitor includes: the method comprises the steps of firstly, positively charging an energy storage capacitor, discharging an excitation coil by the energy storage capacitor after the charging is finished, changing the voltage and polarity at two ends of the energy storage capacitor after the discharging is finished, reversely charging the energy storage capacitor, discharging another excitation coil by the energy storage capacitor after the charging is finished, and changing the voltage and polarity at two ends of the energy storage capacitor again after the discharging is finished.

7. The method for generating a wiggle magnetic field with adjustable frequency and intensity as claimed in claim 6, wherein:

each time the energy storage capacitor is charged, the charging is carried out on the basis of the existing voltage of the energy storage capacitor.

8. The method for generating a wiggle magnetic field with adjustable frequency and intensity as claimed in claim 7, wherein:

controlling the charging time of the energy storage capacitor based on the detection voltage at the two ends of the energy storage capacitor so as to control the charging voltage of the energy storage capacitor; the time interval between two discharges of the energy storage capacitor to the exciting coil is adjusted to change the frequency of the swinging magnetic field.

Technical Field

The invention belongs to the technical field of biological electromagnetism, and particularly relates to a frequency and intensity adjustable oscillating magnetic field generating device and a generating method, which are suitable for biological or cell research.

Background

With the continuous progress of modern biomedicine, the biological electromagnetic technology also sends out unprecedented vitality and vitality. The swing magnetic field is indispensable to the study of biological electromagnetism, and the device of swing magnetic field in the prior art is realized through the make-and-break and the direction switching of the power supply of a direct current power supply coil, and the swing magnetic field is difficult to realize that magnetic field intensity and frequency can be adjusted, and the swing magnetic field intensity is difficult to be very big, and the frequency is also lower.

Disclosure of Invention

The invention aims to overcome the defects of the existing swinging magnetic field generating device and improve the flexibility of the swinging magnetic field device and the high efficiency of electric energy utilization. The invention provides a swinging magnetic field generating device and a generating method for respectively discharging two groups of inductance coils by using an energy storage capacitor to sequentially generate sine pulses.

The invention provides the following technical scheme:

a frequency and intensity adjustable oscillating magnetic field generating device comprises a boosting module, a rectifying module, a filter capacitor, an inverter bridge module, a voltage detection module, an energy storage capacitor, a one-way controllable switch device, two groups of coils and a control system; wherein the content of the first and second substances,

the power frequency alternating current is connected with the input end of the boosting module, the output end of the boosting module is connected with the input end of the rectifying module, the output end of the rectifying module is connected with the filter capacitor, the input end of the inverter bridge module is connected with the two ends of the filter capacitor through the current limiting module, the output end of the inverter bridge module is connected with the two ends of the energy storage capacitor, the voltage detection module is connected with the two ends of the energy storage capacitor and used for detecting the voltage of the energy storage capacitor, and the energy storage capacitor is connected with the two groups of coils through the one-way controllable switch device;

the boosting module is used for boosting the voltage of the power frequency alternating current;

the rectifying module and the filter capacitor are used for rectifying and filtering the alternating current after the voltage is raised;

the inverter bridge module is used for carrying out forward and reverse charging and charging voltage control on the energy storage capacitor;

the unidirectional controllable switching device and the two groups of coils are used for generating a swinging magnetic field through current.

Further, the rectifying module comprises a plurality of rectifying diodes.

Furthermore, the unidirectional controllable switch device is a thyristor, and the two groups of coils are respectively connected with the thyristor.

Further, the control system controls the charging time of the inverter bridge module to the energy storage capacitor based on the detection result of the voltage detection module, so as to control the charging voltage of the energy storage capacitor; the control system adjusts the time interval between two discharges of the coil by the energy storage capacitor to change the frequency of the swinging magnetic field.

Further, each of the two sets of coils is comprised of one or more coils.

The invention also provides a method for generating the oscillating magnetic field with adjustable frequency and strength, which comprises the following steps:

performing voltage lifting on the power frequency alternating current;

rectifying and filtering the alternating current with the boosted voltage;

carrying out forward and reverse charging and charging voltage control on the energy storage capacitor;

generating a swinging magnetic field through the discharge current of the energy storage capacitor;

wherein, carry out forward, reverse charge to energy storage capacitor includes: the method comprises the steps of firstly, positively charging an energy storage capacitor, discharging an excitation coil by the energy storage capacitor after the charging is finished, changing the voltage and polarity at two ends of the energy storage capacitor after the discharging is finished, reversely charging the energy storage capacitor, discharging another excitation coil by the energy storage capacitor after the charging is finished, and changing the voltage and polarity at two ends of the energy storage capacitor again after the discharging is finished.

Furthermore, each time the energy storage capacitor is charged, the charging is carried out on the basis of the existing voltage of the energy storage capacitor.

Further, based on the detection voltage at the two ends of the energy storage capacitor, the charging time of the energy storage capacitor is controlled, and then the charging voltage of the energy storage capacitor is controlled; the time interval between two discharges of the energy storage capacitor to the exciting coil is adjusted to change the frequency of the swinging magnetic field.

According to the invention, a control system firstly controls an inverter bridge module to positively charge an energy storage capacitor, the control system controls the inverter bridge module to charge the energy storage capacitor for a long time according to a measurement result of a voltage detection circuit, the control system controls a first one-way controllable switch device to be turned on after the charging is finished, the energy storage capacitor discharges one group of coils, after the discharging is finished, the control system controls the inverter bridge module to reversely charge the energy storage capacitor, the control system controls the inverter bridge module to charge the energy storage capacitor for a long time according to the measurement result of the voltage detection circuit, the control system controls a second one-way controllable switch device to be turned on after the charging is finished, and the energy storage capacitor discharges two groups of coils until a complete working cycle is finished. Adjusting the duration of one duty cycle can change the frequency of the oscillating magnetic field. The set and group of coils referred to herein may be either a single coil or a plurality of coils.

The invention has the following beneficial effects:

1. the invention generates a magnetic field by discharging the coil through the energy storage capacitor, and can realize that larger current flows through the coil, thereby obviously improving the strength of the swinging magnetic field.

2. The invention adopts a positive and negative charging power supply mode for the energy storage capacitor, and the energy storage capacitor is charged on the basis of the existing initial voltage of the energy storage capacitor every time, thereby shortening the charging time, being beneficial to improving the frequency of the swinging magnetic field, reducing the consumption of electric energy and improving the utilization efficiency of the electric energy.

3. The invention adopts the working mode that one energy storage capacitor discharges two groups of inductance coils, thereby saving the use of energy storage capacitor devices.

4. The invention provides an available device for researching the effect of swinging magnetic fields with different intensities and different frequencies on cells and organisms.

Drawings

FIG. 1 is a schematic diagram of a frequency and intensity adjustable oscillating magnetic field generator according to the present invention;

FIG. 2 is a schematic circuit diagram of an example of a frequency and intensity adjustable wiggle magnetic field generating device according to the present invention;

fig. 3 is a schematic diagram of a control pulse of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention.

In the embodiment of the oscillating magnetic field generating device with adjustable frequency and intensity shown in fig. 1, the device comprises a boosting module, a rectifying module, a filter capacitor, an inverter bridge module, a voltage detection module, an energy storage capacitor, a one-way controllable switching device, two groups of coils and a control system; the power frequency alternating current is connected with the input end of the boosting module, the output end of the boosting module is connected with the input end of the rectifying module, the output end of the rectifying module is connected with the filter capacitor, the input end of the inverter bridge module is connected with the two ends of the filter capacitor through the current limiting module, the output end of the inverter bridge module is connected with the two ends of the energy storage capacitor, the voltage detection module is connected with the two ends of the energy storage capacitor and used for detecting the voltage of the energy storage capacitor, and the energy storage capacitor is connected with the two groups of coils through the one-way controllable switch device; the boosting module is used for boosting the voltage of the power frequency alternating current; the rectifying module and the filter capacitor are used for rectifying and filtering the alternating current after the voltage is raised; the inverter bridge module is used for carrying out forward and reverse charging and charging voltage control on the energy storage capacitor; the unidirectional controllable switching device and the two groups of coils are used for generating a swinging magnetic field through current.

Further, the rectifying module comprises a plurality of rectifying diodes.

Furthermore, the unidirectional controllable switch device is a thyristor, and the two groups of coils are respectively connected with the thyristor.

Further, the control system controls the charging time of the inverter bridge module to the energy storage capacitor based on the detection result of the voltage detection module, so as to control the charging voltage of the energy storage capacitor; the control system adjusts the interval between two discharges of the coil by the energy storage capacitor to change the frequency of the swinging magnetic field.

Further, each of the two sets of coils is comprised of one or more coils.

When the circuit is in steady-state operation, the energy storage capacitor is charged every time on the basis of the existing voltage of the energy storage capacitor.

The control system and the voltage detection module are used for controlling the charging time of the energy storage capacitor by the inverter bridge module to control the charging voltage of the energy storage capacitor, controlling the voltage of the energy storage capacitor when the energy storage capacitor discharges to the coil to determine the intensity of the magnetic field generated by the excitation coil, and adjusting the interval between two times of discharging of the energy storage capacitor to the excitation coil by the control system to change the frequency of the swing magnetic field.

The one-way controllable device can control the conduction and the current can only flow in one direction, and each of the two groups of coils can comprise one or more coils.

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to fig. 2, where the described embodiment is only one implementation manner of the present invention, and does not represent all implementation manners.

The oscillating magnetic field generating device in the present example specifically includes a transformer T1, four rectifier diodes D1, D2, D3, D4, a current limiting resistor R3, a filter capacitor C1, four insulated gate bipolar transistors IGBT1, IGBT2, IGBT3, IGBT4, an energy storage capacitor C2, two thyristors SCR1, SCR2, two sets of coils L1, L2, and resistors R1, R2, where the resistors R1, R2 are coil internal resistances.

The device selects power frequency alternating current as input, boosts the power frequency alternating current by taking a transformer T1 as a boosting module, the transformation ratio of the transformer can be selected after being converted according to the intensity of the magnetic field intensity required to be generated, the alternating current boosted by the transformer is rectified by a rectifying module consisting of rectifying diodes D1, D2, D3 and D4 and then is converted into direct current, a filtering module consisting of a filter capacitor C1 and then is filtered and converted into relatively smooth direct current, the rectified direct current is limited by a current limiting module consisting of a current limiting resistor R3 and then is used as a power supply for charging an energy storage capacitor C2, and the IGBT1 and the IGBT4 in an inverter bridge module consisting of the IGBT1, the IGBT2, the IGBT3 and the IGBT4 are opened to charge the energy storage capacitor with the voltage in the positive direction, namely, the V shown in figure 3 is applied_GE(IGBT1, IGBT4) pulse, the control system controls the IGBT1, IGBT4 in the inverter bridge module to turn off to control the charging time of the energy storage capacitor according to the measurement result of the voltage detection module, further controls the voltage U when the energy storage capacitor discharges the inductor, the voltage U also determines the magnitude of the current flowing through the coil, and after the charging is finished, the thyristor SCR1 is triggered to discharge the coil L1, namely the VT1 pulse shown in FIG. 3 is applied; after the discharge is finished, the voltage and the polarity at the two ends of the energy storage capacitor are changed; then theThe IGBT2 and the IGBT3 in the inverter bridge module are turned on to reversely charge the energy storage capacitor, the control system controls the IGBT2 and the IGBT3 in the inverter bridge module to be turned off according to the measurement result of the voltage detection module to control the charging time of the energy storage capacitor, namely, V shown in figure 3 is applied_GE(IGBT2, IGBT3) pulse, after charging, triggering thyristor SCR2 to discharge coil L2, namely applying VT2 pulse as shown in FIG. 3; after the discharge is finished, the voltage and the polarity at the two ends of the energy storage capacitor are changed again, and the frequency of the swinging magnetic field can be changed by adjusting the duration of one working period till the end of one working period.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and these examples are only for illustrative purpose and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the invention, and these alternatives and modifications are intended to fall within the scope of the invention.